Nepsotic already made the point I was planning on making, but it was buried in the middle of a longer post. I'm going to reiterate it to really bring it to Havoc's attention.
Literally
everything you put in your mouth is toxic. Even that wonderful pure H
2O you love so much. Everything depends on doses. So just saying that Flouride is toxic and therefore it's bad is a ridiculous argument to make.
:
E: Here's an image for (dis)clarity. The cloudiness does settle after some time, this was immediately from the tap
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Does it settle at the bottom? Is there residue? Because to me that looks like air bubbles rather than pollution. That makes extra sense given you said it varies based on what floor you're on.